2x²-3x+1=0(2x-1)(x-1)=02x-1=0或x-1=0x=1/2或1为什么要配方???
2x^2+1=3x2x^2-3x+1=02(x - 3/4)^2 = 1/8(x - 3/4)^2 = 1/16x-3/4 = 1/4 or -1/4x= 1 or 1/2
